A. Zakaria, R. “Spectrophotomeric Estimation of Thymol in Pure and Pharmaceutical Formulation With Diazotized 4-Aminoacetophenone”. College of Basic Education Research Journal, vol. 13, no. 1, June 2014, pp. 923-34, doi:10.33899/berj.2014.Vol13.Iss1.39520.